Machine for projecting colored motion pictures



J. R. HUNT.

MACHINE FOR PROIECTING COLORED MOTION PICTURES.

APPLICATION FILED SEPT. 27, 1919.

Patented Jan. 31, 1922.

1 ,III

UNITED STATES PM'ENT OFFICE.

JOHN ROY HUNT, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO INTERNATIONAL MOVING PICTURE & FILM COMPANY, 0F NASHVILLE, TENNESSEE, A` CORPORA- TION.

MACHINE FOR PROJECTING COLORED MOTION PICTURES.

VSpecification of Letters Patent.

Patented Jan. 31, 1922.

Original application filed- June 16, 1919, SeriaLNo. 304,686. Divided and this application filed Septem- .v ber 27, 1919. Serial No. 326,723.

To all whom t may concern.'

Be it known that I, JOHN ROY HUNT, a citizen of the United States, and a resident of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Machine for Projecting Colored Motion Pictures; and I do hereby declare that the following is a full,` clear, and exact description thereof, reference being had to the superimposed upon each other upon the screen. Unless the parts are absolutely accurate, there will not be accurate and definite presentation of the pictures on the screen.

This application is a division from my application lfiled June 16, 1919, Serial No. 304,686 on a machine for projecting colored moving pictures.

The full nature 0f this invention will be understood from the accompanying drawings and the following description and claims.

In lthe drawings Fig. 1 is a. rear elevation of the feeding, tracking anda erture mechanism in a machine of the kin with a film gate, with the lower aperture in open position. Fi 2 is a side elevation of Awhat appears in gFig. 1 with a portion shown in a vertical section on line 2-2 of Fig. `1. Fig. 3 is a rear elevation of an aperture plate.

Fig. 4 is a horizontal section on the line As seen in Fig. 1 there is a tra-cker plate 13 which carriers aperture plates 14 and 15 for the upper and lower apertures 10 and 11. The aperture plates 14 and 15 are f adjustably mounted by the screws 16, which extend through eccentric holes 17 in the plates 14 and 15. so that by screwing in for each aperture andthe film 12 passes down between the film gates and the aperture plates 14 and 15. Associated'with the tracker plate there is a pilot tension sprocket 18 above each'aperture and an intermittent feedY sprocket 19 below eachaperture, as shown in Fig.` 1. Each sprocket has a stationary flange 2O on its left-hand end and a laterally movable flange 21 on its right hand end which is under tension byreason of a spring 22 surrounding the sprocket shaft and which forces the flange against the edge of the film yieldingly according to the tension of the spring which is adjustable by reason of a nut 23 on the threaded end of asprocket shaft 24. This affords an accurate vmeans for guiding the film as it passes over the sprockets so that it will have absolutely no lateral play or movement. The 'film is further "guided for the sake of absolute accuracy by the following means:

There are vertical tracker strips 25 on the plate 13 at each side of the aperture, as shown in Fig. 4, upon which the film travels. One edge of the film as it travels engages and is guided by the vertical guide bar=26 and the other edge of the film is guided by the eXtra flanges 27, two of which are provided in association with each aperture, the flanges 27 for the lower aperture being shown in the lower part of Fig. l, While said flanges for the upperu aperture are hidden by the Hlm gate 28. These flanges 27 press and hold the film laterally against the guide bars 26 and cause absolutely accurate travel of the films over the apertures.

The flanges 27 are slidable on transversely arranged pins or rods 29 secured to the plate 13 and they are pressed laterally by a spring 30 and the tension thereof is adj usted by the nuts 31. The flanges 27, therefore, cooperate not only with the guide bars 26 but With the flanges 21 of the feed sprockets.

The gate 28'is hinged at 32, see Fig. 4, to brackets 33 secured to the plate 13 and it is held in closed position as shown in the upper parts of Figs. 1 and 2, and in Fig. 4, by a latch 34 that is vpivoted'on plate 13. The film ate carries a tension shoe 35, as

- shown in igs. 1 and 4, and which is pressed into engagement with the film by a spring construct1on 36.

The invention claimed is:

1. A machine for projecting motion pictures, including a plurality of apertures, tracker strips over which the film passes having at one side a guide bar to be-engaged by and guide one edge of the film, and

, flanges yieldingly mountedl in connection with the tracker strip at the other side of the film adapted to engage said side of the film and thereby hold the film securely in place.

2. A machine for projecting motion pictures, including a plurality of apertures, tracker strips over which the film passes having at one side aguide bar to be engaged by and guide one edge'of the film, a pin projecting laterally below the tracker strip beyond the other side thereof, a flange lslidably mounted on said pin in position tol engage the other^ edge of the film, and a spring on said pin for forcing the flange against. the film and a nut for adjusting the tension of the spring.

3. A machine for projecting motion pictures, including a plurality of apertures, a tracker strip located on each side of each aperture for guiding the film, a stationary guide bar connected therewith for guiding one edge of the film, and yieldingly mounted flanges above and below said aperture for engaging the other edge of the film for holding the film securely in place at'the aperture.

In Witness whereof, I have hereuntoafiixed my signature.

`JOHN ROY HUNT. 

